Patents by Inventor Dong-Uk Choi

Dong-Uk Choi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11925051
    Abstract: A display device includes: a first base having a display area; light-emitting elements on the first base; and an encapsulation layer over the light-emitting elements. The encapsulation layer includes: a first inorganic layer; an organic layer on the first inorganic layer; and a second inorganic layer on the organic layer. The first inorganic layer includes: a first buffer layer on the light-emitting elements; a first barrier layer on the first buffer layer; a first porous layer on the first barrier layer; a second barrier layer on the first porous layer; and a second buffer layer on the second barrier layer. A refractive index of the first buffer layer, the first barrier layer, and the first porous layer are different from one another, and the refractive index of the first porous layer is smaller than the refractive index of the first buffer layer and the first barrier layer.
    Type: Grant
    Filed: May 7, 2021
    Date of Patent: March 5, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yong Tack Kim, Eung Seok Park, Jae Hyuk Lee, Yoon Hyeung Cho, Dong Uk Choi
  • Patent number: 11818937
    Abstract: An organic light emitting display is provided. The organic light emitting display includes a first base substrate; a plurality of organic light emitting diodes disposed on the first base substrate; an encapsulation layer disposed on the organic light emitting diodes; and a plurality of first color conversion filters disposed on the encapsulation layer. The encapsulation layer includes: a first sub-inorganic layer disposed on the organic light emitting diodes; a second sub-inorganic layer disposed on the first sub-inorganic layer and having a refractive index different from that of the first sub-inorganic layer; an organic layer disposed on the second sub-inorganic layer; and a third sub-inorganic layer disposed on the organic layer.
    Type: Grant
    Filed: December 6, 2021
    Date of Patent: November 14, 2023
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yo Han Kim, Yong Tack Kim, Yoon Hyeung Cho, Jong Jin Park, Deok Chan Yoon, Yun Kyu Lee, Dong Uk Choi
  • Publication number: 20220093691
    Abstract: An organic light emitting display is provided. The organic light emitting display includes a first base substrate; a plurality of organic light emitting diodes disposed on the first base substrate; an encapsulation layer disposed on the organic light emitting diodes; and a plurality of first color conversion filters disposed on the encapsulation layer. The encapsulation layer includes: a first sub-inorganic layer disposed on the organic light emitting diodes; a second sub-inorganic layer disposed on the first sub-inorganic layer and having a refractive index different from that of the first sub-inorganic layer; an organic layer disposed on the second sub-inorganic layer; and a third sub-inorganic layer disposed on the organic layer.
    Type: Application
    Filed: December 6, 2021
    Publication date: March 24, 2022
    Inventors: Yo Han KIM, Yong Tack KIM, Yoon Hyeung CHO, Jong Jin PARK, Deok Chan YOON, Yun Kyu LEE, Dong Uk CHOI
  • Publication number: 20220059799
    Abstract: A display device includes: a first base having a display area; light-emitting elements on the first base; and an encapsulation layer over the light-emitting elements. The encapsulation layer includes: a first inorganic layer; an organic layer on the first inorganic layer; and a second inorganic layer on the organic layer. The first inorganic layer includes: a first buffer layer on the light-emitting elements; a first barrier layer on the first buffer layer; a first porous layer on the first barrier layer; a second barrier layer on the first porous layer; and a second buffer layer on the second barrier layer. A refractive index of the first buffer layer, the first barrier layer, and the first porous layer are different from one another, and the refractive index of the first porous layer is smaller than the refractive index of the first buffer layer and the first barrier layer.
    Type: Application
    Filed: May 7, 2021
    Publication date: February 24, 2022
    Inventors: Yong Tack KIM, Eung Seok PARK, Jae Hyuk LEE, Yoon Hyeung CHO, Dong Uk CHOI
  • Patent number: 11195884
    Abstract: An organic light emitting display is provided. The organic light emitting display includes a first base substrate; a plurality of organic light emitting diodes disposed on the first base substrate; an encapsulation layer disposed on the organic light emitting diodes; and a plurality of first color conversion filters disposed on the encapsulation layer. The encapsulation layer includes: a first sub-inorganic layer disposed on the organic light emitting diodes; a second sub-inorganic layer disposed on the first sub-inorganic layer and having a refractive index different from that of the first sub-inorganic layer; an organic layer disposed on the second sub-inorganic layer; and a third sub-inorganic layer disposed on the organic layer.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: December 7, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yo Han Kim, Yong Tack Kim, Yoon Hyeung Cho, Jong Jin Park, Deok Chan Yoon, Yun Kyu Lee, Dong Uk Choi
  • Publication number: 20200258946
    Abstract: An organic light emitting display is provided. The organic light emitting display includes a first base substrate; a plurality of organic light emitting diodes disposed on the first base substrate; an encapsulation layer disposed on the organic light emitting diodes; and a plurality of first color conversion filters disposed on the encapsulation layer. The encapsulation layer includes: a first sub-inorganic layer disposed on the organic light emitting diodes; a second sub-inorganic layer disposed on the first sub-inorganic layer and having a refractive index different from that of the first sub-inorganic layer; an organic layer disposed on the second sub-inorganic layer; and a third sub-inorganic layer disposed on the organic layer.
    Type: Application
    Filed: December 6, 2019
    Publication date: August 13, 2020
    Inventors: Yo Han KIM, Yong Tack KIM, Yoon Hyeung CHO, Jong Jin PARK, Deok Chan YOON, Yun Kyu LEE, Dong Uk CHOI
  • Patent number: 10290923
    Abstract: An electronic device is provided. The electronic device includes a housing including a window that forms a first side of the electronic device, and a second side that is disposed opposite to the first side, a touch sensor disposed adjacent to the window and configured to generate a capacitance, an input circuit operably connected to the touch sensor and configured to detect an input based on a variation in the capacitance, an antenna radiator at least one of partially disposed inside the housing and a part of the housing, a ground operably disposed between the first side and the second side, a communication circuit operably connected to the antenna radiator and the ground, and an antenna matching circuit operably connected to the touch sensor and the input circuit.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: May 14, 2019
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Dong-Uk Choi, Sang-Pil Lee, Jangje Park, Jinu Kim, Bumjin Cho, Inyong Hwang
  • Patent number: 10144410
    Abstract: A hybrid construction machine is disclosed, which comprises an engine, a generator, the generator connected to the engine, a converter connected to the generator, and an ESS (Energy Storage System) connected to the converter. The hybrid construction machine further comprises a converter current detector positioned either between the converter and the generator or between the converter and the ESS to detect the current flowing between the converter and the generator, an ESS current detector positioned between the converter and the ESS to detect the current flowing between the converter and the ESS, a processing unit receiving the current detected from the converter current detector and the ESS current detector and calculating the operation time of the respective component, and a display unit displaying the operation time of the respective component. Since the hybrid construction machine calculates the operation time of the respective component and displays the same to an operator.
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: December 4, 2018
    Assignee: VOLVO CONSTRUCTION EQUIPMENT AB
    Inventor: Dong-Uk Choi
  • Patent number: 9640286
    Abstract: An apparatus for cooling a spent fuel pool having a heat exchanger includes a cooling water pool positioned above the spent fuel pool; a floating device configured to be elevated according to a water level of a cooling water in the spent fuel pool; and an emergency cooling water supply pipe configured to form a path through which the cooling water of the cooling water pool is moved to the spent fuel pool and configured to include a floating valve that opens or closes a flow passage of the cooling water in connection with the elevation of the floating device.
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: May 2, 2017
    Assignee: KEPCO NUCLEAR FUEL CO., LTD.
    Inventors: Sang Jong Lee, Geol Woo Lee, Young Baek Kim, Jae Don Choi, Jae Il Lee, Sung Ju Cho, Jung Seon An, Dong Kyu Lee, Hye Jin Kim, Dong Uk Choi
  • Publication number: 20170043758
    Abstract: A hybrid construction machine is disclosed, which comprises an engine, a generator, the generator connected to the engine, a converter connected to the generator, and an ESS (Energy Storage System) connected to the converter. The hybrid construction machine further comprises a converter current detector positioned either between the converter and the generator or between the converter and the ESS to detect the current flowing between the converter and the generator, an ESS current detector positioned between the converter and the ESS to detect the current flowing between the converter and the ESS, a processing unit receiving the current detected from the converter current detector and the ESS current detector and calculating the operation time of the respective component, and a display unit displaying the operation time of the respective component. Since the hybrid construction machine calculates the operation time of the respective component and displays the same to an operator.
    Type: Application
    Filed: April 24, 2014
    Publication date: February 16, 2017
    Inventor: Dong-Uk CHOI
  • Publication number: 20170033442
    Abstract: An electronic device is provided. The electronic device includes a housing including a window that forms a first side of the electronic device, and a second side that is disposed opposite to the first side, a touch sensor disposed adjacent to the window and configured to generate a capacitance, an input circuit operably connected to the touch sensor and configured to detect an input based on a variation in the capacitance, an antenna radiator at least one of partially disposed inside the housing and a part of the housing, a ground operably disposed between the first side and the second side, a communication circuit operably connected to the antenna radiator and the ground, and an antenna matching circuit operably connected to the touch sensor and the input circuit.
    Type: Application
    Filed: July 22, 2016
    Publication date: February 2, 2017
    Inventors: Dong-Uk CHOI, Sang-Pil Lee, Jangje Park, Jinu Kim, Bumjin Cho, Inyong Hwang
  • Patent number: 9230761
    Abstract: An emergency stop system for a hybrid excavator is provided, which includes an emergency switch and an emergency stop unit. In a normal operation state, a power supply that is applied from a power supply unit is provided to a hybrid controller and an engine controller, while when the emergency switch is pressed, the input power supply is intercepted to effectively stop the operation of the hybrid system in the case where equipment abnormality or an emergency situation occurs. Also, when the emergency switch is pressed, the power supply is applied to an emergency alarm unit and an energy discharge unit to notify an operator and neighboring persons of the equipment abnormality and emergency situation occurrence, and a hybrid power source vanishes completely.
    Type: Grant
    Filed: July 21, 2010
    Date of Patent: January 5, 2016
    Assignee: VOLVO CONSTRUCTION EQUIPMENT AB
    Inventors: Ji-Yun Kim, Eui-Chul Kim, Dong-Uk Choi
  • Patent number: 8969713
    Abstract: Disclosed herein is a photoelectric conversion device having a semiconductor substrate including a front side and back side, a protective layer formed on the front side of the semiconductor substrate, a first non-single crystalline semiconductor layer formed on the back side of the semiconductor substrate, a first conductive layer including a first impurity formed on a first portion of a back side of the first non-single crystalline semiconductor layer, and a second conductive layer including the first impurity and a second impurity formed on a second portion of the back side of the first non-single crystalline semiconductor layer.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: March 3, 2015
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Min-Seok Oh, Jung-Tae Kim, Nam-Kyu Song, Min Park, Yun-Seok Lee, Czang-Ho Lee, Myung-Hun Shin, Byoung-Kyu Lee, Yuk-Hyun Nam, Seung-Jae Jung, Mi-Hwa Lim, Joon-Young Seo, Dong-Uk Choi, Dong-Seop Kim, Byoung-June Kim
  • Patent number: 8802972
    Abstract: Disclosed herein is a photoelectric conversion device having a semiconductor substrate including a front side and back side, a protective layer formed on the front side of the semiconductor substrate, a first non-single crystalline semiconductor layer formed on the back side of the semiconductor substrate, a first conductive layer including a first impurity formed on a first portion of a back side of the first non-single crystalline semiconductor layer, and a second conductive layer including the first impurity and a second impurity formed on a second portion of the back side of the first non-single crystalline semiconductor layer.
    Type: Grant
    Filed: June 2, 2009
    Date of Patent: August 12, 2014
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Min-Seok Oh, Jung-Tae Kim, Nam-Kyu Song, Min Park, Yun-Seok Lee, Czang-Ho Lee, Myung-Hun Shin, Byoung-Kyu Lee, Yuk-Hyun Nam, Seung-Jae Jung, Mi-Hwa Lim, Joon-Young Seo, Dong-Uk Choi, Dong-Seop Kim, Byoung-June Kim
  • Patent number: 8738239
    Abstract: A swing control system and method for a construction machine using an electric motor is provided. The swing control system includes a swing electric motor swinging an upper swing structure and a swing control unit.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: May 27, 2014
    Assignee: Volvo Construction Equipment Holding Sweden AB
    Inventors: Jong Min Kang, Ahn Kyun Jung, Chun Seung Lee, Ji Yun Kim, Dong Uk Choi, Jung Sun Jo, Sung Kon Kim, Bong Soo Yoo
  • Patent number: 8680588
    Abstract: A field effect transistor includes a buried gate pattern that is electrically isolated by being surrounded by a tunneling insulating film. The field effect transistor also includes a channel region that is floated by source and drain regions, a gate insulating film, and the tunneling insulating film. The buried gate pattern and the tunneling insulating film extend into the source and drain regions. Thus, the field effect transistor efficiently stores charge carriers in the buried gate pattern and the floating channel region.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: March 25, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ming Li, Dong-Uk Choi, Chang-Woo Oh, Dong-Won Kim, Min-Sang Kim, Sung-Hwan Kim, Kyoung-Hwan Yeo
  • Patent number: 8666613
    Abstract: A swing control system for a hybrid construction machine has a swing operating lever, an electric swing motor, a speed detection sensor which detects the rotary speed of a swing motor, a controller that calculates the driving speed of the swing motor by a swing operating signal created by the operation of the swing operating lever and by a detecting signal of the rotary speed, an inverter which drives the swing motor by a control signal from the controller, a swing inertia detector that detects the swing inertia of equipment and an inertia torque compensator which compares the torque compensation value in accordance with the equipment inertia, and outputs a calculated torque value for controlling the swing motor to the inverter.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: March 4, 2014
    Assignee: Volvo Construction Equipment AB
    Inventor: Dong-Uk Choi
  • Publication number: 20130311054
    Abstract: A swing control system for a hybrid construction machine has a swing operating lever, an electric swing motor, a speed detection sensor which detects the rotary speed of a swing motor, a controller that calculates the driving speed of the swing motor by a swing operating signal created by the operation of the swing operating lever and by a detecting signal of the rotary speed, an inverter which drives the swing motor by a control signal from the controller, a swing inertia detector that detects the swing inertia of equipment and an inertia torque compensator which compares the torque compensation value in accordance with the equipment inertia, and outputs a calculated torque value for controlling the swing motor to the inverter.
    Type: Application
    Filed: December 15, 2010
    Publication date: November 21, 2013
    Applicant: Volvo Construction Equipment AB
    Inventor: Dong-Uk Choi
  • Patent number: 8455344
    Abstract: A non-volatile memory device includes field insulating layer patterns on a substrate to define an active region of the substrate, upper portions of the field insulating layer patterns protruding above an upper surface of the substrate, a tunnel insulating layer on the active region, a charge trapping layer on the tunnel insulating layer, a blocking layer on the charge trapping layer, first insulating layers on upper surfaces of the field insulating layer patterns, and a word line structure on the blocking layer and first insulating layers.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: June 4, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Suk-Kang Sung, Choong-Ho Lee, Dong-Uk Choi, Hee-Soo Kang
  • Publication number: 20130119784
    Abstract: An emergency stop system for a hybrid excavator is provided, which includes an emergency switch and an emergency stop unit. In a normal operation state, a power supply that is applied from a power supply unit is provided to a hybrid controller and an engine controller, while when the emergency switch is pressed, the input power supply is intercepted to effectively stop the operation of the hybrid system in the case where equipment abnormality or an emergency situation occurs. Also, when the emergency switch is pressed, the power supply is applied to an emergency alarm unit and an energy discharge unit to notify an operator and neighboring persons of the equipment abnormality and emergency situation occurrence, and a hybrid power source vanishes completely.
    Type: Application
    Filed: July 21, 2010
    Publication date: May 16, 2013
    Applicant: VOLVO CONSTRUCTION EQUIPMENT AB
    Inventors: Ji-Yun Kim, Eui-Chul Kim, Dong-Uk Choi